Suppose the reduced row echelon form of the augremental matr

Suppose the reduced row echelon form of the augremental matrix of a system equation is: Find a general solution for this system. F

Back substitution gives

x_4+5x_5=7

x_4=7-5x_5

x_3+3x_5=8

x_3=8-3x_5

x_1+4x_2-2x_5=9

x_1=-4x_2+2x_5+9

So general solution is

(-4x_2+2x_5+9,x_2,x8-3x_5,7-5x_5,x_5)